JSFiddle - React, Tailwind, and code Playground

HTML

<div class="cont">
    <img src="http://ubuntulife.files.wordpress.com/2008/04/space-art-wallpaper.jpg" />
</div>

CSS

*{margin:0; padding:0;}
.cont{width:100%; height:100%; display:block;}
.cont img{width:100%; height:100%;}